Update at 3:05 p.m. – Arlington is now under a severe thunderstorm warning until 3:45 p.m.

More from the National Weather Service:

At 259 PM EDT, a severe thunderstorm was located over Reston, moving east at 35 mph.

HAZARD…60 mph wind gusts.

SOURCE…Radar indicated.

IMPACT…Damaging winds will cause some trees and large branches to fall. This could injure those outdoors, as well as damage homes and vehicles. Roadways may become blocked by downed trees. Localized power outages are possible. Unsecured light objects may become projectiles.

Earlier: The National Weather Service issued a severe thunderstorm watch for Arlington County, in effect until 9 p.m. tonight.

The watch spreads across an area covering six states on the East Coast. NWS warns of isolated hailstones the size of ping pong balls, wind gusts up to 70 mph and frequent lightning.


Arlington County and the rest of the D.C. metropolitan area is under a Code Orange alert today (Friday) for its air quality.

With temperatures and humidity expected to build today and continue through the Fourth of July holiday, the Metropolitan Washington Council of Governments issued its alert, warning that sensitive groups could be affected and should avoid strenuous activity or outdoor exercise.

More from MWCOG and the National Weather Service:

The Metropolitan Washington Council of Governments in association with Maryland Department of the Environment, Virginia Department of Environmental Quality, and District Department of Environment has issued a Code ORANGE Air Quality Alert Friday for the DC metro area.

A Code Orange Air Quality Alert means that air pollution concentrations within the region may become unhealthy for sensitive groups. Sensitive groups include children, people suffering from asthma, heart disease or other lung diseases and the elderly. The effects of air pollution can be minimized by avoiding strenuous activity or exercise outdoors.

For more information on ground-level ozone and fine particles… visit www.cleanairpartners.net.

MWCOG forecasts that the air quality will drop down to moderate levels this weekend.

Image via Environmental Protection Agency’s AirNow service


Update at 7:50 p.m. — The number of outages in Arlington is down to 200, according to Dominion.

Earlier: More than 5,500 Dominion customers are without power in Arlington following this afternoon’s storms, mostly in and around the Clarendon area.

The Clarendon outage extends from Wilson Blvd down to N. Bedford Street in Lyon Park, near Route 50. Numerous businesses in the area are without power and the busy intersection of Washington Blvd and 10th Street N.

As of 4:50 p.m. Dominion was reporting 5,542 outages in Arlington, with some smaller outages scattered throughout the county. There have also been reports of trees and utility wires down in the roadway in various locations, and at least one tree that fell and damaged a house.

The Arlington County Police Department is reminding drivers to treat dark traffic signals as a four-way stop.

Power outage map (top) via Dominion. Weather radar via weather.com.


Update at 3:20 p.m. — Arlington is now under a Severe Thunderstorm Warning until 4 p.m.

Earlier: The National Weather Service has issued a severe thunderstorm watch for Arlington County, effective until 8 p.m.

NWS advises that the storms may bring scattered hail up to the size of ping pong balls, high winds up to 70 mph and frequent lightning.

The watch has been issued across an area including the entire D.C. metropolitan area as well as parts of West Virginia and North Carolina.

A flash flood watch is also in effect, warning of 1-2 inches or more of rain this evening.


Heavy rains and severe storms may make for a challenging evening commute today (Monday).

The National Weather Service has issued a Flash Flood Watch, warning of 1-2 inches of rain or more this evening. (See below.)

NWS and local authorities are also cautioning that some storms today may be severe.

The Flash Flood Watch:

… FLASH FLOOD WATCH IN EFFECT FROM 3 PM EDT THIS AFTERNOON THROUGH THIS EVENING… THE NATIONAL WEATHER SERVICE IN STERLING VIRGINIA HAS ISSUED A * FLASH FLOOD WATCH… * FROM 3 PM EDT THIS AFTERNOON THROUGH THIS EVENING * A COLD FRONT WILL MOVE THROUGH THE REGION THIS AFTERNOON AND EARLY THIS EVENING. WIDESPREAD SHOWERS AND THUNDERSTORMS WILL ACCOMPANY THIS FRONT SOME OF WHICH COULD PRODUCE INTENSE RAINFALL RATES IN A SHORT PERIOD OF TIME. WIDESPREAD RAINFALL AMOUNTS OF 1 TO 2 INCHES ARE EXPECTED WITH LOCALIZED AMOUNTS OF 3 TO 4 INCHES POSSIBLE WHICH COULD RESULT IN FLASH FLOODING. * FLASH FLOODING OF CREEKS, STREAMS AND ROADWAYS WILL BE POSSIBLE, ESPECIALLY IN URBAN AND POOR DRAINAGE AREAS. PRECAUTIONARY/PREPAREDNESS ACTIONS… A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION. YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION SHOULD FLASH FLOOD WARNINGS BE ISSUED. &&


Part of south Arlington is under a Severe Thunderstorm Warning late Thursday afternoon

From the National Weather Service:

THE NATIONAL WEATHER SERVICE IN STERLING VIRGINIA HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR… THE CENTRAL DISTRICT OF COLUMBIA… WEST CENTRAL PRINCE GEORGES COUNTY IN CENTRAL MARYLAND… NORTHWESTERN CHARLES COUNTY IN SOUTHERN MARYLAND… SOUTHEASTERN ARLINGTON COUNTY IN NORTHERN VIRGINIA… SOUTHEASTERN FAIRFAX COUNTY IN NORTHERN VIRGINIA… THE CITY OF ALEXANDRIA IN NORTHERN VIRGINIA… * UNTIL 615 PM EDT * AT 527 PM EDT, A SEVERE THUNDERSTORM WAS LOCATED OVER FORT BELVOIR, MOVING NORTHEAST AT 15 MPH. HAZARD… 60 MPH WIND GUSTS AND QUARTER SIZE HAIL. SOURCE… RADAR INDICATED. IMPACT… DAMAGING WINDS WILL CAUSE SOME TREES AND LARGE BRANCHES TO FALL. THIS COULD INJURE THOSE OUTDOORS, AS WELL AS DAMAGE HOMES AND VEHICLES. ROADWAYS MAY BECOME BLOCKED BY DOWNED TREES. LOCALIZED POWER OUTAGES ARE POSSIBLE. UNSECURED LIGHT OBJECTS MAY BECOME PROJECTILES. * LOCATIONS IMPACTED INCLUDE… ARLINGTON, ALEXANDRIA, SPRINGFIELD, FORT WASHINGTON, FORT HUNT, GROVETON, HUNTINGTON, CORAL HILLS, FORT BELVOIR, NATIONAL HARBOR, REAGAN NATIONAL AIRPORT, CRYSTAL CITY, RFK STADIUM, NATIONALS PARK, GALLAUDET UNIVERSITY, BURKE, LINCOLNIA, LORTON, FRANCONIA AND OXON HILL. PRECAUTIONARY/PREPAREDNESS ACTIONS… GET INDOORS TO PROTECT YOURSELF FROM WIND AND LIGHTNING. TREES AROUND YOU MAY BE DOWNED FROM DAMAGING WINDS, SO IF YOU ARE NEAR LARGE TREES, MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR. DON’T DRIVE UNDERNEATH TREES OR IN WOODED AREAS UNTIL THE THREAT HAS PASSED. && HAIL… 1.00IN WIND… 60MPH


The National Weather Service has issued a severe thunderstorm warning for southeastern Arlington until 9:30 a.m.

NWS said severe thunderstorms are along a line from Fort Belvoir to near Prince Frederick, and are moving north towards the D.C. metro area at 65 miles per hour. Residents should expect gusting winds up to 60 miles per hour that could cause some trees to fall and damage homes and cars. Heavy rain is expected to last all morning.

The Capital Weather Gang noted this morning that some isolated storms may be possible in the region later this afternoon. Those storms could be powerful, and bring with them hail, wind and even a tornado.

More from NWS:

The National Weather Service in Sterling Virginia has issued a

* Severe Thunderstorm Warning for…
The District of Columbia…
Central Anne Arundel County in central Maryland…
Northern St. Marys County in southern Maryland…
Southeastern Montgomery County in central Maryland…
Northwestern Calvert County in southern Maryland…
Prince Georges County in central Maryland…
Northeastern Charles County in southern Maryland…
Southeastern Arlington County in northern Virginia…
Southeastern Fairfax County in northern Virginia…
The City of Alexandria in northern Virginia…

* Until 930 AM EDT

* At 835 AM EDT, severe thunderstorms were located along a line
extending from near Fort Belvoir to near Prince Frederick, moving
north at 65 mph.

HAZARD…60 mph wind gusts.

SOURCE…Radar indicated.

IMPACT…Damaging winds will cause some trees and large branches
to fall. This could injure those outdoors, as well as
damage homes and vehicles. Roadways may become blocked by
downed trees. Localized power outages are possible.
Unsecured light objects may become projectiles.

* Locations impacted include…
Arlington, Alexandria, Waldorf, Bowie, Annapolis, Clinton, College
Park, Crofton, Fort Washington, Greenbelt, Langley Park,
Beltsville, Fort Hunt, Groveton, Forestville, Huntington, Largo,
Coral Hills, Bladensburg and Mayo.


Update at 9:10 p.m. — The Severe Thunderstorm Watch has been cancelled.

Earlier: The National Weather Service issued a severe thunderstorm watch for Arlington, in effect until 11 p.m.

NWS said a line of showers and thunderstorms are moving west, and have the potential to bring strong to damaging gusts of wind this evening.


The National Weather Service has issued a severe thunderstorm warning for Arlington.

The warning is in effect until 8:45 p.m.

From NWS:

National Weather Service Baltimore MD/Washington DC
805 PM EDT THU APR 20 2017

The National Weather Service in Sterling Virginia has issued a

* Severe Thunderstorm Warning for…
The District of Columbia…
Southeastern Montgomery County in central Maryland…
Northern Prince Georges County in central Maryland…
Arlington County in northern Virginia…
The City of Falls Church in northern Virginia…
Northeastern Fairfax County in northern Virginia…

* Until 845 PM EDT

* At 804 PM EDT, a severe thunderstorm was located over American
University, or near Rosslyn, moving east at 30 mph.

HAZARD…60 mph wind gusts.

SOURCE…Radar indicated.

IMPACT…Damaging winds will cause some trees and large branches
to fall. This could injure those outdoors, as well as
damage homes and vehicles. Roadways may become blocked by
downed trees. Localized power outages are possible.
Unsecured light objects may become projectiles.

* Locations impacted include…
Arlington, Bethesda, Bowie, College Park, Greenbelt, Langley Park,
Beltsville, Forestville, Falls Church, Largo, Coral Hills,
Bladensburg, Pimmit Hills, Mclean, Byrd Stadium, Fedex Field, Fort
Totten, Rosslyn, Nationals Park and Howard University.

PRECAUTIONARY/PREPAREDNESS ACTIONS…

Get indoors to protect yourself from wind and lightning. Trees around
you may be downed from damaging winds, so if you are near large
trees, move to an interior room on the lowest floor. Don`t drive
underneath trees or in wooded areas until the threat has passed.


Update at 11:20 p.m. — The National Weather Service confirms that an EF-0 tornado tracked through Arlington and into the District on Thursday.

Earlier: The storms that whipped through Arlington and the D.C. region yesterday brought power outages and damage, and more trees toppled today, according to the Arlington County Fire Department.

But now the Capital Weather Gang believes the storms caused something else: a rare tornado in Arlington.

As CWG reported, the National Weather Service officially confirmed tornadoes in Herndon and in Southeast D.C. on Thursday. But the CWG team lists several other areas where they believe small tornadoes may have touched down, including in South Arlington near the Pentagon.

Radar indicated rotation there around 1:40 p.m., as noted on Twitter by weather enthusiast Ian Livingston.

Photographic evidence of damage near the Army Navy Country Club is consistent with tornadic activity, according to CWG. That’s also close to where one person was hurt when part of the Macy’s facade and roof at the Pentagon City mall was damaged and fell onto a car yesterday.

The National Weather Service reportedly is assessing damage near the Tidal Basin to determine if a tornado occurred there and along the H Street Corridor; the same storm caused the Arlington circulation. The Capital Weather Gang indicates the possible Arlington tornado may have been a separate occurrence from the one at the Tidal Basin, or that one tornado may have passed over the entire area in question.


(Updated at 2:50 p.m.) A severe thunderstorm that ripped through Arlington just after lunchtime has left some debris and damage in its wake.

In Pentagon City, part of the facade and roof of the Macy’s at the Pentagon City mall was damaged and a portion of it fell onto a car. One minor injury has been reported. As of 2:45 p.m., workers were on the roof inspecting the damage.

According to scanner reports, a tree fell on a car near the intersection of Route 50 and Park Drive. The two occupants of the vehicle were shaken up but not injured.

A tree fell into a home on the 1400 block of N. Wakefield Street, a few blocks from Washington-Lee High School, according to a fire department dispatch. The tree caused damage to the front of the house, but did not hit a car parked next door.

A number of other instances of trees and utility lines falling have been reported around the county, including at the intersections of S. Wayne Street and 6th Street S., S. Adams Street and 8th Street S., and 31st Street S. and S. Randolph Street.

As of 2:45 p.m., just over 550 Dominion customers were without power, according to the company’s outage map.

Via Twitter, residents say the storm brought hail in addition to very strong winds.


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